#ifndef _TERMIOS_H_
#define _TERMIOS_H_

#include <sys/cdefs.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <stdint.h>
#include <linux/termios.h>

__BEGIN_DECLS

// 重新定义它们以匹配其ioctl编号
#undef  TCSANOW
#define TCSANOW    TCSETS

#undef  TCSADRAIN
#define TCSADRAIN  TCSETSW

#undef  TCSAFLUSH
#define TCSAFLUSH  TCSETSF

static __inline__ int tcgetattr(int fd, struct termios *s) {
    return ioctl(fd, TCGETS, s);
}

static __inline__ int tcsetattr(int fd, int __opt, const struct termios *s) {
    return ioctl(fd, __opt, (void *) s);
}

static __inline__ int tcflow(int fd, int action) {
    return ioctl(fd, TCXONC, (void *) (intptr_t) action);
}

static __inline__ int tcflush(int fd, int __queue) {
    return ioctl(fd, TCFLSH, (void *) (intptr_t) __queue);
}

static __inline__ pid_t tcgetsid(int fd) {
    pid_t _pid;
    return ioctl(fd, TIOCGSID, &_pid) ? (pid_t) - 1 : _pid;
}

static __inline__ int tcsendbreak(int fd, int __duration) {
    return ioctl(fd, TCSBRKP, (void *) (uintptr_t) __duration);
}

static __inline__ speed_t cfgetospeed(const struct termios *s) {
    return (speed_t)(s->c_cflag & CBAUD);
}

static __inline__ int cfsetospeed(struct termios *s, speed_t speed) {
    s->c_cflag = (s->c_cflag & ~CBAUD) | (speed & CBAUD);
    return 0;
}

static __inline__ speed_t cfgetispeed(const struct termios *s) {
    return (speed_t)(s->c_cflag & CBAUD);
}

static __inline__ int cfsetispeed(struct termios *s, speed_t speed) {
    s->c_cflag = (s->c_cflag & ~CBAUD) | (speed & CBAUD);
    return 0;
}

static __inline__ void cfmakeraw(struct termios *s) {
    s->c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IXON);
    s->c_oflag &= ~OPOST;
    s->c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
    s->c_cflag &= ~(CSIZE | PARENB);
    s->c_cflag |= CS8;
}

__END_DECLS

#endif /* _TERMIOS_H_ */